1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Read CopyrightID inside OTSCanonicalRecord → must equal the CopyrightID above 5. GET OTSVerificationAPI → pre-computed 6-check result from server 6. If all match: this entity was registered on CopyrightChains at OTSTimestamp, independently verifiable on Bitcoin
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x597be8197e8ae64490dfd9d4f859b66e9f87dc74bc903970f3fad31f0fa0259e. Chain 2 (Bitcoin): anchored in block 953626 (2026-06-14T11:41:45Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/2a74ba21-a549-48d4-a29a-0743a49172cf.json and https://artists.proofprofile.net/proofs/artist/2a74ba21-a549-48d4-a29a-0743a49172cf.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6897cdf105cadbba07b9a667b7dc4b5fd78c74d31382dde081478331f38e9d6f. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZNWX2340573.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7dc9e8b427a98736855ae07d2cb8099e10f894707a007238b72615a7aa0dec8f. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZTAY2445116.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10e17261ac0a748c3bf57161babdf5dd29ea3b31e06f3c25606b33c834ff550b. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZTAY2445119.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2edf036677f13e961d8ea5a43c09fcfdf52e6d425c205bd286a46c544db0a1f7. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T18:26:23Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZWFH2489684.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x225379744770f61da71a1999442d44e8cb7d5d563ab7aecec7fe57c9f7aa2cce. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZES82514946.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa57a95c1f67ce40e2ab059b8d37e00ba986940a7300657059a9afd431df8dd39. Chain 2 (Bitcoin): anchored in block 958673 (2026-07-19T05:38:28Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZHN62558422.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0e7ed5f8fa0dba453de4a54866497a453b38eae6e6cf3fbd385f29455f06257. Chain 2 (Bitcoin): anchored in block 957775 (2026-07-13T00:04:23Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZMEP2576299.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7cfcb464e74cd751a001d5b7a1702df4361b836c635f7398dd9c5857ba557e5. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZNWX2539087.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed72f7ef2c35c219f88a91b37fab3f80355b7c18a40b457fed344a51bbb2eb1f. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZTAU2583482.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84822849bd714f9be661ca0c2da4ac398f689fce0717f3afcb741c99d1a4e50b. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:39:22Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZTB22523956.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x268135e11467a4bb9c72c30319c733494ec765877371fac75988c48232c1513f. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZTB92577166.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92c9ccd339c7a45e7012d80cfee5e6cd51f41565072de9dd5b5351418455ee5b. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZWFK2574722.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x027e4be279e4c47041cbe60831e81e2ea0f10d554037a740e4324ab5654a4326. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZZ7N2547140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf149f0e33c9259c8f54938244df3464d6fc4d45755a32fa51afb17056b3379e. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZZ7V2552261.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d4487a1123211d8ba4357280d5048e1c3a674ad22b0c34d6ddcea414b0172b2. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QT3F52506073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfdb958f09b91fb7198620aea4cecc522350614761db9ad121aca97ef14c11b0. Chain 2 (Bitcoin): anchored in block 958832 (2026-07-20T08:26:03Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QT3FH2547205.